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Question
500 ml 0.5 M NaOH দ্রবণ হতে সেন্টিমোলার দ্রবণ তৈরি করতে কি পরিমাণ পানির প্রয়োজন ?
2000 mL
25000 mL
2500 mL
24500 mL
ANSWER : 2
Descrption
<p>V<sub>1</sub>S<sub>1</sub> = V<sub>2</sub>S<sub>2</sub></p><p>Or, V<sub>2</sub> = V<sub>2</sub>S<sub>2</sub>/S<sub>1</sub> = (500 × 0.5)/0.01 = 25000mL</p><p>পানি প্রয়োজন = (25000 – 500)mL = 24500mL</p><p>এখানে, V<sub>1</sub> = 500mL, S<sub>1</sub> = 0.5M, V<sub>2</sub> = ?, S<sub>2</sub> = 0.01M [সেন্টিমোলার দ্রবণ বলে]</p>
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